Operational Data Checking

An automatic data checking system has been implemented at ECMWF to trigger warnings in case of anomalies affecting the quality or the availability of the data assimilated by the model. Selected statistical parameters (number of observations, bias correction, and mean bias-corrected background, analysis departures and probability of gross error) are checked against an expected range. An appropriate alert message (including a time series plot) is generated if statistics are outside the specified ranges. A severity level (slight, considerable, severe) is assigned to each message depending on how far statistics are from the expected values. Two kinds of ranges are used by the automatic checking: Soft and Hard limits. Soft limits are updated automatically using statistics from the last twenty days (extremes are excluded during this process). Hard limits are adjusted manually when required.

Currently, the automatic checking is limited to data passing through the minimisation process (including VarBC passive data). It's being applied twice a day to the delayed cut-off 4D-VAR cycles (00 and 12) and four times a day to the early delivery assimilation system (00,06,12 and 18).

The alarm system results are based on feedback information from the ECMWF data assimilation and consequently reflect the ECMWF data usage. Although most warnings are related to data problems, they may on occasion also be related to model issues. Alerts are provided for information on an as-is basis and may be withdrawn or changed without notice. ECMWF accepts no responsibility for actions taken on the basis of these results.

Early delivery 4D-VAR at 2022-10-02 12:00

iasi
METOP-B IASI RADIANCES CHANNEL 89 : out of range
10 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.3060, expected range: 0.2573 0.2843
METOP-B IASI RADIANCES CHANNEL 106 : out of range
10 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.2927, expected range: 0.2477 0.2697
METOP-B IASI RADIANCES CHANNEL 131 : out of range
26 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.2729, expected range: 0.2303 0.2533
METOP-B IASI RADIANCES CHANNEL 138 : out of range
36 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.2633, expected range: 0.2270 0.2415
METOP-B IASI RADIANCES CHANNEL 146 : out of range
11 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.2749, expected range: 0.2268 0.2535
METOP-B IASI RADIANCES CHANNEL 151 : out of range
18 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.2629, expected range: 0.2203 0.2435
METOP-B IASI RADIANCES CHANNEL 163 : out of range
12 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.2579, expected range: 0.2198 0.2368
METOP-B IASI RADIANCES CHANNEL 189 : out of range
16 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.2591, expected range: 0.2146 0.2318
METOP-B IASI RADIANCES CHANNEL 303 : out of range
11 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.2493, expected range: 0.2103 0.2325
METOP-B IASI RADIANCES CHANNEL 386 : out of range
33 times in the last 10 days for at least one item
Severely_persistent: avg_fgdepar=-0.0182, expected range: 0.0774 0.1389
METOP-C IASI RADIANCES CHANNEL 51 : out of range
5 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2525, expected range: -0.0726 0.1003
METOP-C IASI RADIANCES CHANNEL 57 : out of range
11 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2353, expected range: -0.0666 0.0719
METOP-C IASI RADIANCES CHANNEL 63 : out of range
16 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2263, expected range: -0.0764 0.0525
Severely_persistent: avg_biascorr=0.2287, expected range: 0.1620 0.1998
METOP-C IASI RADIANCES CHANNEL 85 : out of range
30 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.4255, expected range: 0.0467 0.2312
Severely_persistent: avg_biascorr=0.3422, expected range: 0.2538 0.2842
METOP-C IASI RADIANCES CHANNEL 59 : out of range
29 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.3568, expected range: 0.3144 0.3304
METOP-C IASI RADIANCES CHANNEL 61 : out of range
20 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.3278, expected range: 0.2737 0.3022
METOP-C IASI RADIANCES CHANNEL 79 : out of range
31 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.3755, expected range: 0.3148 0.3256
METOP-C IASI RADIANCES CHANNEL 83 : out of range
31 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.3875, expected range: 0.3031 0.3338
METOP-C IASI RADIANCES CHANNEL 386 : out of range
39 times in the last 10 days for at least one item
Severely_persistent: avg_fgdepar=-0.0355, expected range: 0.0862 0.1239
METOP-C IASI RADIANCES (37 channels affected) : out of range
2 times in the last 10 days for at least one item
Severe: avg_biascorr=0.0693, expected range: 0.1173 0.1604
atms
NPP ATMS RADIANCES CHANNEL 11 : out of range
24 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.3359, expected range: -0.3057 -0.2845
NPP ATMS RADIANCES CHANNEL 12 : out of range
39 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.2634, expected range: -0.2117 -0.1569
NPP ATMS RADIANCES CHANNEL 9 : out of range
39 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.5715, expected range: -0.4736 -0.4586
NOAA20 ATMS RADIANCES CHANNEL 10 : out of range
39 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.4853, expected range: -0.4350 -0.4340
NOAA20 ATMS RADIANCES CHANNEL 12 : out of range
39 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.3677, expected range: -0.3201 -0.2873
ssmis
DMSP-17 SSMIS RADIANCES CHANNEL 17 : out of range
11 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-2.4048, expected range: -2.8898 -2.6204
DMSP-18 SSMIS RADIANCES CHANNEL 5 : out of range
6 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2108, expected range: 0.7648 1.4528
Atmospheric Motion Vector
AQUA MODIS CLEAR WV WIND VECTOR DIFF (M/S) PRESSURE LAYER 300-600 (HPA : out of range
9 times in the last 10 days for at least one item
Severely_persistent: obs_number=37.0000, expected range: 8.7446 8.9330
All GOES-17 AMV CLOUDY WV3 ALL LAYERS Global : all data missing
Severely_persistent: obs_number=0, expected range: 1428.11 3998.92
resat
NOAA-19 SBUV OZONE, TOP PRESSURE LAYER 1010-1011 (HPA) : out of range
28 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=2.7531, expected range: 1.2322 1.9796
METOP-B GOME-2 OZONE, TOP PRESSURE LAYER 12-13 (HPA) : out of range
24 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.6813, expected range: -0.8170 -0.7564
AURA OMI OZONE, TOP PRESSURE LAYER 12-13 (HPA) : out of range
4 times in the last 10 days for at least one item
Slight: obs_number=10515.0000, expected range: 5324.3267 9415.6442